I have tight bladder neck stop start urinating, feeling pee all time, and split stream sometimes and sometimes small line of pee. all caused by this?

Yes,...: All of your urinary symptoms could be related with tight bladder neck. Despite knowing so much about this subject nowadays, still keep professionally humble in accepting: Behind what we know does still hide a lot of what we don't know. So, the effort to work with doctor & exercising due diligence and vigilance in evaluation & treatment adjustment is still key in managing intractable urinary Sx...